Mounting structure for hydrogen tank

Abstract

To provide a support structure for a hydrogen tank capable of suppressing rupture of rubber used for mounting.SOLUTION: A support structure for a hydrogen tank comprises a mounting rubber directly fixed around a mouthpiece of the hydrogen tank, and the mouthpiece of the hydrogen tank is clamped and supported by a support member via the mounting rubber.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a mounting structure (support structure) for a hydrogen tank. [Background technology]

[0002] Patent Document 1 discloses that in a hydrogen tank, the mouthpiece is neck-mounted (supported at the neck portion of the mouthpiece) and fixed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-206042 Summary of the Invention [Problem to be solved by the invention]

[0004] When neck-mounting the nozzle, a neck block may be used. In such cases, a mounting rubber is placed between the neck block and the bracket, but in the event of an impact, such as a vehicle collision, the impact is likely to be transmitted to the side of the hydrogen tank, causing the mounting rubber to shear and the hydrogen tank to fall.

[0005] The present disclosure has been made in consideration of these circumstances, and aims to provide a support structure for a hydrogen tank that can prevent the rubber used during mounting from breaking. [Means for solving the problem]

[0006] This application discloses a support structure for a hydrogen tank in which a mounting rubber is fixed directly around the periphery of the nozzle of the hydrogen tank, and the nozzle of the hydrogen tank is supported by being sandwiched between a support body via the mounting rubber. [Effects of the Invention]

[0007] According to the present disclosure, the friction of the mounting rubber prevents the hydrogen tank from rotating, and the mounting rubber body is restrained by the support body, which prevents the mounting rubber from breaking even when subjected to an impact such as a vehicle collision. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a schematic view of the appearance of a hydrogen tank 10. As shown in FIG. [Figure 2] FIG. 2 is a diagram illustrating a support structure 20 for a hydrogen tank. [Figure 3] FIG. 3 is a diagram illustrating a support structure 30 for a hydrogen tank. DETAILED DESCRIPTION OF THE INVENTION

[0009] 1. Hydrogen tank structure FIG. 1 is a perspective view for explaining a hydrogen tank 10 supported by a support structure for a hydrogen tank according to one embodiment of the present disclosure. The hydrogen tank 10 is a tank that stores hydrogen at high pressure as a fuel gas to be supplied to, for example, a fuel cell (not shown). The hydrogen tank 10 that can be used here is well known, but for example, the hydrogen tank 10 has a cylindrical cylinder portion 11 and dome portions 12 that are provided continuously on both sides of the cylinder portion 11 in the axial direction and are formed so that their diameter decreases as they proceed in the axial direction. Both the cylinder portion 11 and the dome portion 12 are formed by covering a liner with a fiber reinforcement layer formed by winding a fiber bundle using the filament winding method (FW method).

[0010] A nozzle 13 is provided on the side of dome section 12 opposite the side connected to cylinder section 11 (the end with the narrowest diameter). The nozzle 13 is held in place by a liner that corresponds to the portion of dome section 12, and a portion of the nozzle 13 is covered together with the liner by a fiber reinforcement layer. Another portion of the nozzle 13 protrudes from dome section 12. This protruding portion serves as neck section 13a, and neck section 13a is supported by support structures 20 and 30 of the hydrogen tank, which will be described later. A valve mechanism (not shown) is connected to the nozzle 13. The valve mechanism is provided with various valve mechanisms involved in supplying gas into the tank and discharging gas from the tank.

[0011] 2. Hydrogen tank support structure 2.1.Form 1 Figures 1 and 2 show diagrams illustrating a hydrogen tank support structure 20 according to form 1. Figure 1 shows a mounting rubber 21 that constitutes part of the hydrogen tank support structure 20. Figure 2 shows the hydrogen tank support structure 20 from the direction of arrow II in Figure 1, with the hydrogen tank 10 supported by the hydrogen tank support structure 20. Although neither Figure 1 nor Figure 2 shows a cross section, some components are shown with hatching to make it easier to distinguish between them.

[0012] As can be seen from FIGS. 1 and 2, the support structure 20 for the hydrogen tank includes a mounting rubber 21 and a support body 22.

[0013] The mounting rubber 21 is a sheet-like member made of rubber. In the hydrogen tank support structure 20, this mounting rubber 21 is fixed by being wrapped around the outer periphery of the neck portion 13a of the nozzle 13 of the hydrogen tank 10. There are no particular limitations on the method for fixing the mounting rubber 21 to the neck portion 13a, but examples include baking (lining) or using an adhesive. The material that makes up the mount rubber is not particularly limited as long as it is an elastic member that can reduce vibration transmission and absorb torsion, but mount rubber materials such as natural rubber, NBR (nitrile rubber), EPDM (ethylene propylene rubber), butyl rubber, and IIR (butyl rubber) can be used.

[0014] The support body 22 in this embodiment has a plate-like first holding member 23 and a second holding member 24, and supports the neck portion 13a of the base 13 by sandwiching the base 13 between the two plate surfaces via a mount rubber 21. Therefore, the first holding member 23 and the second holding member 24 have recesses 23a and 24a shaped (arcuate) in a direction along the circumferential direction of the base 13, and the neck portion 13a of the base 13 is sandwiched between the inside of these recesses 23a and 24a via the mount rubber 21. 2, first holding member 23 and second holding member 24 are fastened by fixing members 25, 26 (combinations of bolts and nuts) on one side and the other side of the portion (recesses 23a, 24a) that holds ferrule 13. Note that fixing member 26 has spring 26a threaded through the shaft of the bolt, and the biasing force of spring 26a allows flexibility in the tightening force.

[0015] 2.2.Form 2 Figures 1 and 3 show diagrams illustrating a hydrogen tank support structure 30 according to embodiment 2. Figure 1 shows a mounting rubber 21 that constitutes part of the hydrogen tank support structure 30 (this is common to embodiment 1). Figure 3 is a cross-sectional view (a cross-section perpendicular to the axis of the cylindrical nozzle 13) of the supported portion of the hydrogen tank 10 when the hydrogen tank 10 is supported by the hydrogen tank support structure 30.

[0016] As can be seen from FIGS. 1 and 3, the support structure 30 for the hydrogen tank includes a mounting rubber 21 and a support body 32.

[0017] The mount rubber 21 can be considered to be the same as the mount rubber 21 described in the first embodiment, and therefore the same reference numerals are used and the description thereof will be omitted.

[0018] In this embodiment, the support 32 has a base 33 and a support block 34, and the support block 34 is fixed to the base 33 by bolts 35 arranged on both ends thereof. The support block 34 is provided with a hole 34a into which the part of the mouthpiece 13 on which the mount rubber 21 is arranged can be inserted, and the part of the mouthpiece 13 on which the mount rubber 21 is arranged is inserted into this hole. The support block 34 is provided with a slit 34b that leads from the outside of the support block 34 to the hole 34a. The slit 34b not only leads to the hole 34a from the outside (penetrating in the direction of arrow A), but also penetrates the support block 34 in a direction perpendicular to the slit 34a (into / outside the plane of the paper in FIG. 3, direction B (not shown)). By arranging one of the bolts 35 so that it penetrates the slit 34b in a direction perpendicular to both the directions of arrow A and B (up and down the plane of the paper in FIG. 3, direction of arrow C), the width of the slit 34b (size in the direction of arrow C) can be changed by tightening the bolt, and the tightening force of the mouthpiece 13 can be adjusted.

[0019] 2.3. Effects etc. According to the hydrogen tank support structure described above, the mounting rubber can reduce the transmission of vibrations to the hydrogen tank body and absorb torsion. Furthermore, according to the hydrogen tank support structure disclosed herein, the mounting rubber, which is fixed to the periphery of the cylindrical part of the mouthpiece (neck), is clamped and secured between supports, preventing rotation of the hydrogen tank through friction of the mounting rubber. Because the mounting rubber is constrained by the supports, it is possible to prevent the mounting rubber from breaking even when subjected to an impact such as a collision. [Explanation of symbols]

[0020] 10... Hydrogen tank, 11... Cylinder portion, 12... Dome portion, 13... Nozzle (neck portion), 20, 30... Support structure of hydrogen tank, 21... Mount rubber, 22, 32... Support body

Claims

[Claim 1] A support structure for a hydrogen tank, A mounting rubber is fixed directly around the nozzle of the hydrogen tank, the nozzle of the hydrogen tank is sandwiched and supported by a support body via the mount rubber; Hydrogen tank support structure.

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