JP6536367B2 - Mounting structure for mounting the tank on the vehicle body - Google Patents

Description

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

  BACKGROUND ART Conventionally, there is known a structure in which a tank used for storage of high pressure gas such as hydrogen is fixed to a vehicle or the like by a band-like band along a direction intersecting the longitudinal direction of the tank (for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2005-075224

  In the structure described in Patent Document 1, when the tank is fixed to the vehicle so that the longitudinal direction of the tank and the longitudinal direction of the vehicle are parallel, when the tank collides with an object in the traveling direction of the vehicle, An external force along the longitudinal direction is applied to the tank. In general, the friction between the band and the tank is not large. For this reason, in the above case, even in the case of a relatively light collision, the tank may be dropped from the vehicle as a result of the position of the tank relative to the band shifting.

The present invention has been made to solve the above-described problems, and can be realized as the following modes.
[Form 1] In a mounting structure for mounting a tank on a vehicle body, the bracket includes a bracket provided at a base portion of the tank, and a bolt for fixing the bracket to the vehicle body, and the bracket has a bolt hole penetrating in a thickness direction And the bolt fixes the bracket and the vehicle body in a state of being inserted into the bolt hole, and the bolt and the bracket are such that a predetermined external force along the longitudinal direction of the tank is the tank And the bracket is fastened with a torque such that the bracket does not move relative to the bolt, and the bracket has a notch with a width smaller than the shaft diameter of the bolt, and the bracket A notch extending in the thickness direction is provided along the longitudinal direction from the bolt hole, and the mounting structure further includes: It surrounds at least part of the periphery of the click has a support member for supporting the tank from below, and a resilient member disposed between the supporting member and the tank mounting structure. According to this aspect, by providing the bracket, it is possible to suppress the tank from falling off the vehicle body when a relatively small external force is applied to the tank in the longitudinal direction. Further, according to this aspect, when a relatively large external force is applied to the tank, the bolt can come off from the bracket through the notch and the tank can come off the vehicle body, thereby reducing the impact on the tank.

(1) According to one aspect of the present invention, a mounting structure for mounting a tank on a vehicle body is provided. The mounting structure includes a bracket provided at a base portion of the tank, and a bolt for fixing the bracket to the vehicle body, the bracket has a bolt hole penetrating in a thickness direction, and the bolt is the bolt The bracket and the vehicle body are fixed in a state of being inserted into the hole, and the bolt and the bracket are the bolt even when a predetermined external force along the longitudinal direction of the tank is applied to the tank. The bracket is fastened with a torque such that the bracket does not move relative to the bracket, and the bracket has a notch smaller in width than the shaft diameter of the bolt, the notch penetrating the bracket in the thickness direction Are provided along the longitudinal direction from the bolt hole. According to this aspect, by providing the bracket, it is possible to suppress the tank from falling off the vehicle body when a relatively small external force is applied to the tank in the longitudinal direction. Further, according to this aspect, when a relatively large external force is applied to the tank, the bolt can come off from the bracket through the notch and the tank can come off the vehicle body, thereby reducing the impact on the tank.

  The present invention can be realized in various forms, for example, in the form of a vehicle having a tank mounting structure.

It is the schematic which shows the mounting structure which mounts a tank in a vehicle body. It is a schematic diagram which shows the AA cross section of FIG. It is a schematic diagram which shows the BB cross section of FIG. It is a schematic diagram of the mounting structure in the state which external force added to the tank. It is a cross-sectional enlarged view of the bolt hole in the state which external force added to the tank.

A. Embodiment:
FIG. 1 is a schematic view showing a mounting structure 100 for mounting a tank 10 according to an embodiment of the present invention to a vehicle body 30. As shown in FIG. Only a part of the vehicle body 30 is shown in the figure. XYZ axes orthogonal to one another are illustrated in FIG. In FIG. 1, the Y-axis direction indicates the longitudinal direction of the tank 10, and the Z-axis direction indicates the vertical direction. The + Z-axis direction indicates a vertically upward direction, and the -Z-axis direction indicates a vertically downward direction. The XYZ axes are the same in the drawings after FIG.

  The mounting structure 100 for mounting the tank 10 on the vehicle body 30 includes a support member 20, a bolt 40 and a bracket 50. The mounting structure 100 is mounted on a fuel cell vehicle that travels using electric power generated by the fuel cell as a driving power source.

  The tank 10 is filled with high pressure hydrogen for supplying the fuel cell. The tank 10 is formed by winding a fiber such as rayon carbon fiber, polyacrylonitrile (PAN) carbon fiber, or pitch carbon fiber on a liner made of high strength aluminum or stainless steel. .

  The tank 10 includes a substantially cylindrical cylindrical portion 12 formed in a central portion, a substantially hemispherical dome portion 14 continuously formed from both ends of the cylindrical portion 12, and a tank 10 in the longitudinal direction (Y-axis direction) And cap portions 16 and 18 provided on both ends of the In the present embodiment, the tank 10 is mounted such that the longitudinal direction of the tank 10 and the longitudinal direction of the vehicle body 30 are along. The + Y axis direction indicates the front direction of the vehicle body 30, and the -Y axis direction indicates the rear direction of the vehicle body 30.

  The bracket 50 is provided at the base portion 16 of the tank 10. In the longitudinal direction (Y-axis direction) of the tank 10, at least a part of the mouthpiece portion 16 is disposed at a position overlapping the bracket 50. Further, at least a part of the bracket 50 is disposed at a position overlapping the dome portion 14 of the tank 10 in the vertical direction (Z-axis direction). In the present embodiment, the bracket 50 is in contact with the mouthpiece portion 16, and the bracket 50 is formed of iron. The bracket 50 has a bolt hole 52 which penetrates in the thickness direction (Z-axis direction) and into which a bolt is inserted.

  The bracket 50 is fixed to the vehicle body 30 by a bolt 40. That is, the bolt 40 fixes the bracket 50 and the vehicle body 30 in a state of being inserted into the bolt hole 52. In the present embodiment, the bracket 50 is fixed to the floor panel of the vehicle body 30.

  The bolt 40 and the bracket 50 are fastened at a predetermined torque such that the bracket does not move relative to the bolt 40 even when a predetermined external force along the longitudinal direction (Y-axis direction) of the tank is applied to the tank 10 It is done. In addition, the material, thickness, and the like of the bracket 50 are selected so as not to be plastically deformed even when a predetermined external force is applied.

  A schematic view showing a cross section of the bolt 40 and the bolt hole 52 is shown on the right side of FIG. The bracket 50 is provided with a notch 52A whose width is smaller than the shaft diameter of the bolt 40. The notch 52A penetrates in the thickness direction (Z-axis direction) of the bracket 50, and is provided along the longitudinal direction (Y-axis direction) of the tank 10 from the bolt hole 52. When an external force larger than a predetermined external force is applied to the bracket 50, the strength of the bracket 50 and the width of the notch 52A are adjusted such that the notch 52A is opened.

  FIG. 2: is a schematic diagram which shows the AA cross section of FIG. As shown in FIG. 2, in the present embodiment, a washer 42 is provided between the bracket 50 and the bolt 40. In the present embodiment, the friction coefficient stabilizer is applied to the bolt 40. By doing this, it is possible to reduce the variation in friction coefficient among the vehicles.

  As shown in FIG. 1, the support member 20 is a member that surrounds at least a part of the periphery of the tank 10 and supports the tank 10. In the present embodiment, the support member 20 supports the tank 10 from below. The tank 10 is supported by two sets of support members 20 in the vicinity of both ends of the cylindrical portion 12 in the longitudinal direction (Y-axis direction). The support member 20 is formed of plate-like stainless steel. The support member 20 is fixed to the vehicle body 30. In the present embodiment, the support member 20 is fixed to the floor panel of the vehicle body 30.

  FIG. 3: is a schematic diagram which shows the BB cross section of FIG. As shown in FIG. 3, an elastic body 25 is provided between the tank 10 and the support member 20. The force with which the support member 20 fixes the tank 10 in the longitudinal direction (Y-axis direction) of the tank 10 is determined by the frictional force between the tank 10 and the elastic body 25. In the present embodiment, the force with which the support member 20 fixes the tank 10 in the longitudinal direction (Y-axis direction) of the tank 10 is smaller than the force with which the bracket 50 fixes the tank 10.

  According to the mounting structure 100 of the present embodiment, by providing the bracket 50, the movement of the tank 10 in the -Y axis direction is suppressed. For this reason, when external force in the -Y-axis direction smaller than the predetermined external force described above is applied to the tank 10, it is possible to suppress the tank 10 from falling from the vehicle body 30. On the other hand, the case where an external force larger than a predetermined external force is applied to the tank 10 will be described below.

  FIG. 4 is a schematic view of the mounting structure 100 in a state where an external force F in the −Y axis direction is applied to the tank 10. The external force F is a force larger than a predetermined external force. In this case, the external force received by the tank 10 is also applied to the bracket 50 of the tank 10 as the bracket 50 contacts the dome portion 14 of the tank 10.

  FIG. 5 is an enlarged cross-sectional view of the bolt hole 52 in a state in which the external force F is applied to the tank 10. FIG. 5A shows a state in which the width of the notch 52A is opened by the application of the external force F to the bolt hole 52. As shown in FIG. FIG. 5B shows a state in which the bolt 40 is disengaged from the bolt hole 52 of the bracket 50 when the notch 52A is opened. Thus, when an external force F larger than a predetermined force is applied to the tank 10, the bolt 40 is disengaged from the bolt hole 52 of the bracket 50. As a result, when the tank 10 falls from the vehicle body 30 before a large external force is applied to the tank 10, the impact on the tank 10 can be reduced. For this reason, when a large external force is applied to the tank 10 and the tank 10 is broken, it is possible to suppress the leakage of high pressure hydrogen filled in the tank 10.

B. Modification:
B1. Modification 1:
In the above embodiment, the bracket 50 is formed of iron. However, the present invention is not limited to this. The bracket 50 may be made of, for example, aluminum or stainless steel.

B2. Modification 2:
In the above-described embodiment, the mounting structure 100 includes the support member 20. However, the present invention is not limited to this. The mounting structure 100 may not include the support member 20. Moreover, in the above-mentioned embodiment, although the two support members 20 are provided, one may be sufficient and three or more may be sufficient. When there is one supporting member 20, it may be a plate-like member that covers both ends of the cylindrical portion 12 of the tank 10.

B3. Modification 3:
In the above-described embodiment, the bracket 50 is provided on the -Y axial direction side with respect to the tank 10. However, the present invention is not limited to this. The bracket 50 may be provided on the + Y axial direction side with respect to the tank 10, and may be provided on the + Y axial direction side and the −Y axial direction side with respect to the tank 10.

B4. Modification 4:
In the embodiment described above, the bracket 50 is in contact with the mouthpiece portion 16. However, the present invention is not limited to this, and the bracket 50 may not be in contact with the mouthpiece portion 16. As an embodiment in which the bracket 50 does not contact the mouthpiece portion 16, for example, at least a part of the mouthpiece portion 16 is disposed at a position overlapping the bracket 50 in the longitudinal direction (Y axis direction) of the tank 10 ), At least a part of the bracket 50 may be disposed at a position overlapping with the dome portion 14 of the tank 10.

B5. Modification 5:
In the above embodiment, the tank 10 is filled with high pressure hydrogen, but the present invention is not limited thereto. The tank 10 may be filled with gas or liquid other than hydrogen.

B6. Modification 6:
In the above embodiment, the vehicle body of the fuel cell vehicle is used as the vehicle body. However, the present invention is not limited to this. As a car body, for example, a car of a battery car or a car of a gasoline car may be used.

B7. Modification 7:
In the above-described embodiment, the notch 52A is provided in the bracket 50 so as to connect the bolt hole 52 and the external space. However, the present invention is not limited to this. A part of the bracket 50 may be connected on the −Y axial direction side of the notch 52A. In such a case, the width of the connected portion may be adjusted so as to be cut when the above-mentioned predetermined external force is applied to the bracket 50.

  The present invention is not limited to the above-described embodiment and modifications, and can be realized in various configurations without departing from the scope of the invention. For example, the technical features in the embodiments corresponding to the technical features in each of the modes described in the section of the summary of the invention can be used to solve some or all of the problems described above, or one of the effects described above. It is possible to replace or combine as appropriate to achieve part or all. Also, if the technical features are not described as essential in the present specification, they can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Tank 12 ... Cylindrical part 14 ... Dome part 16, 18 ... Base part 20 ... Support member 25 ... Elastic body 30 ... Vehicle body 40 ... Bolt 42 ... Washer 50 ... Bracket 52 ... Bolt hole 52A ... Notch 100 ... Mounting structure F ... external force

Claims (1)

In the mounting structure for mounting the tank on the vehicle body,
A bracket provided on a cap portion of the tank;
And a bolt for fixing the bracket to the vehicle body,
The bracket has a bolt hole penetrating in the thickness direction, and the bolt fixes the bracket and the vehicle body in a state of being inserted into the bolt hole,
The bolt and the bracket are fastened by a torque such that the bracket does not move relative to the bolt even when a predetermined external force along the longitudinal direction of the tank is applied to the tank,
The bracket is a notch having a width smaller than the shaft diameter of the bolt, and the notch penetrating the bracket in the thickness direction is provided along the longitudinal direction from the bolt hole ,
The mounting structure further includes a support member surrounding at least a part of the periphery of the tank and supporting the tank from below, and an elastic body disposed between the tank and the support member. Construction.

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