Vehicle floor structure

1. A vehicle floor structure of a vehicle, the vehicle floor structure comprising:

a floor disposed on a bottom portion of a vehicle body;

a plurality of tank mounting members attached to a bottom surface of the floor; and

a plurality of hydrogen tanks mounted on the plurality of tank mounting members,

wherein each tank mounting member is aligned to extend in a longitudinal direction of the vehicle,

wherein the plurality of tank mounting members is spaced from each other in a width direction of the vehicle,

wherein each tank mounting member has a plurality of lower recessed portions provided in a lower portion thereof, and

wherein at least predetermined upper portions of the hydrogen tanks are received in the lower recessed portions of the tank mounting members, respectively.

2. The vehicle floor structure of claim 1 ,

wherein each hydrogen tank has a cylindrical shape having a predetermined radius, and

wherein each lower recessed portion has an arced shape having a same radius as a radius of each hydrogen tank.

3. The vehicle floor structure of claim 1 ,

wherein each hydrogen tank is aligned to extend in the width direction of the vehicle, and

wherein a longitudinal axis of each hydrogen tank is aligned to be parallel to a width axis of the vehicle.

4. The vehicle floor structure of claim 1 ,

wherein the plurality of hydrogen tanks is mounted on the plurality of tank mounting members through a plurality of mounting bands,

wherein the plurality of mounting bands is aligned with the plurality of tank mounting members,

wherein each mounting band has a plurality of recesses, and

wherein at least predetermined lower portions of the hydrogen tanks are accommodated in the recesses, respectively.

5. The vehicle floor structure of claim 4 , further including:

a frame attached to the bottom surface of the floor,

wherein the frame includes a pair of side members disposed on first and second edge portions of the floor, respectively, and a plurality of crossmembers extending between the pair of side members, and

wherein the plurality of tank mounting members is fixed to the plurality of crossmembers.

6. The vehicle floor structure of claim 5 ,

wherein each tank mounting member has a plurality of upper recessed portions provided in an upper portion thereof, and

wherein the plurality of upper recessed portions receives the plurality of crossmembers therein, respectively.

7. The vehicle floor structure of claim 5 , wherein the plurality of crossmembers includes:

a front crossmember to which a front end portion of each of the tank mounting members is fixed;

a rear crossmember to which a rear end portion of each of the tank mounting members is fixed; and

a plurality of middle crossmembers disposed between the front crossmember and the rear crossmember.

8. The vehicle floor structure of claim 7 ,

wherein a front end portion of each of the mounting bands is fixed to the front crossmember together with the front end portion of each of the tank mounting members via a first front bolt, and

wherein the front crossmember is fixed to the bottom surface of the floor via a second front bolt.

9. The vehicle floor structure of claim 8 ,

wherein the front crossmember has a cavity defined therein,

wherein the front crossmember includes a first front nut and a second front nut provided in the cavity of the front crossmember,

wherein the first front nut is positioned below the second front nut in the cavity,

wherein the first front bolt is screwed into the first front nut through the front end portion of each of the mounting bands and the front end portion of each of the tank mounting members, and

wherein the second front bolt is screwed into the second front nut through the floor.

10. The vehicle floor structure of claim 8 ,

wherein the front crossmember has a cavity defined therein,

wherein the front crossmember includes a front nut provided in the cavity of the front crossmember,

wherein the first front bolt is screwed into lower internal threads of the front nut through the front end portion of each of the mounting bands and the front end portion of each of the tank mounting members, and

wherein the second front bolt is screwed into upper internal threads of the front nut through the floor.

11. The vehicle floor structure of claim 7 ,

wherein a rear end portion of each of the mounting bands is fixed to the rear crossmember together with the rear end portion of each of the tank mounting members via a first rear bolt, and

wherein the rear crossmember is fixed to the bottom surface of the floor via a second rear bolt.

12. The vehicle floor structure of claim 11 ,

wherein the rear crossmember has a cavity defined therein,

wherein the rear crossmember includes a first rear nut and a second rear nut provided in the cavity of the rear crossmember,

wherein the first rear nut is positioned below the second rear nut in the cavity of the rear crossmember,

wherein the first rear bolt is screwed into the first rear nut through the rear end portion of each of the mounting bands and the rear end portion of each of the tank mounting members, and

wherein the second rear bolt is screwed into the second rear nut through the floor.

13. The vehicle floor structure of claim 11 ,

wherein the rear crossmember has a cavity defined therein,

wherein the rear crossmember includes a rear nut provided in the cavity of the rear crossmember,

wherein the first rear bolt is screwed into lower internal threads of the rear nut, and

wherein the second rear bolt is screwed into upper internal threads of the rear nut.

14. The vehicle floor structure of claim 7 ,

wherein middle portions of the tank mounting members are fixed to the corresponding middle crossmembers through a plurality of first middle bolts.

15. The vehicle floor structure of claim 14 , further including:

a plurality of center slide rails mounted on a top surface of the floor,

wherein each center slide rail is aligned to extend in the longitudinal direction of the vehicle,

wherein a longitudinal axis of each tank mounting member is aligned with a longitudinal axis of each center slide rail, and

wherein the center slide rails are fixed to the floor together with the tank mounting members through a plurality of second middle bolts.

16. The vehicle floor structure of claim 15 ,

wherein each middle crossmember has a cavity defined therein,

wherein each middle crossmember includes a first middle nut and a second middle nut provided in the cavity of each middle crossmember,

wherein the first middle nut is positioned below the second middle nut in the cavity of each middle crossmember,

wherein a corresponding first middle bolt is screwed into the first middle nut, and

wherein a corresponding second middle bolt is screwed into the second middle nut.

17. The vehicle floor structure of claim 15 ,

wherein each middle crossmember has a cavity defined therein,

wherein each middle crossmember includes a middle nut provided in the cavity of each middle crossmember,

wherein a corresponding first middle bolt is screwed into lower internal threads of the middle nut, and

wherein a corresponding second middle bolt is screwed into upper internal threads of the middle nut.

18. The vehicle floor structure of claim 15 ,

wherein the plurality of center slide rails is fixed to the floor together with the plurality of tank mounting members via a plurality of upper bolts,

wherein each of the tank mounting members includes a plurality of upper nuts embedded therein, and

wherein the plurality of upper bolts is screwed into the plurality of upper nuts.

19. The vehicle floor structure of claim 1 , further including:

a plurality of reinforcing crossmembers extending between the plurality of tank mounting members,

wherein a longitudinal axis of each reinforcing crossmember is aligned to be parallel to a longitudinal axis of each hydrogen tank.

20. The vehicle floor structure of claim 19 ,

wherein the plurality of reinforcing crossmembers is fixed to the floor together with the plurality of tank mounting members.