JP6493183B2 - Vehicle structure - Google Patents

Description

  The present invention relates to a vehicle structure on which a fuel cell is mounted.

  An attachment structure for a fuel tank for a vehicle in which a fuel tank is disposed below the rear seat and below the floor is disclosed (see Patent Document 1).

JP 2009-149140 A

  The fuel tank described in the above-described conventional example is applicable to a fuel cell-equipped vehicle that travels using electric power generated by the fuel cell. In this case, gaseous fuel such as hydrogen gas for operating the fuel cell is accommodated in the fuel tank in a high pressure state. In addition, a secondary battery may be disposed on the floor of the rear seat on the vehicle rear side. Further, a drive motor for driving the rear wheels may be arranged behind the fuel tank below the floor vehicle. In such a fuel cell-equipped vehicle, a countermeasure against a rear collision is desired.

  An object of this invention is to provide the vehicle structure which can suppress the influence on a secondary battery and a drive motor at the time of a rear surface collision.

  The vehicle structure according to claim 1 is provided with a fuel tank fixed to a vehicle lower portion of a vehicle floor via a tank bracket, a vehicle lower portion of the floor and a vehicle rear of the fuel tank, and a motor mount. A rear wheel drive motor fixed to a rear wheel suspension member, and the tank bracket and the motor mount are arranged side by side in the vehicle longitudinal direction.

  In this vehicle structure, the tank bracket and the motor mount are arranged side by side in the vehicle front-rear direction. Therefore, the collision load input to the rear end of the vehicle at the time of the rear collision is transmitted from the rear part of the floor to the front part of the floor via the drive motor, the motor mount and the tank bracket. As a result, deformation of the floor, particularly deformation of the portion between the motor mount and the tank bracket, is suppressed, so that contact of the drive motor with the fuel tank is suppressed. In addition, by suppressing the deformation of the floor, even when a secondary battery is mounted on the floor, the influence on the secondary battery at the time of a rear collision is suppressed.

  According to the vehicle structure according to the present invention, it is possible to provide an excellent effect that it is possible to provide a vehicle structure that can suppress the influence on the secondary battery and the drive motor at the time of a rear collision.

It is a sectional side view showing the vehicle structure concerning this embodiment. In the vehicle structure which concerns on this embodiment, it is a top view which shows arrangement | positioning of a tank bracket and a motor mount.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the drawing, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper direction of the vehicle, and the arrow RH indicates the right direction of the vehicle.

  In FIG. 1, a vehicle structure S according to the present embodiment relates to a structure of a vehicle 10 on which, for example, a fuel cell (not shown) is mounted, and includes a fuel tank 12 and a drive motor 14.

  The fuel tank 12 is fixed below the floor 16 of the vehicle 10 via a tank bracket 26. The fuel tank 12 is a container for storing gaseous fuel such as hydrogen gas supplied to the fuel cell in a high pressure state.

  Here, the floor 16 is a part constituting the floor portion of the body 18 of the vehicle 10, and has a floor panel 20, for example. For example, reinforcing members 22 to 25 are provided on the lower surface side of the floor panel 20. The floor panel 20 and the reinforcing members 22 to 25 each have a closed cross-sectional structure. The reinforcing members 22 and 23 are located near the front side of the fuel tank 12 in the vehicle. The reinforcing member 24 is located between the fuel tank 12 and the drive motor 14. The tank bracket 26 is provided at the position of the reinforcing member 24. The reinforcing member 25 is located near the vehicle rear side of the drive motor 14.

  On the floor 16, for example, a rear seat 30 is provided. The fuel tank 12 is disposed below the rear seat 30 in the vehicle. Specifically, the fuel tank 12 is configured, for example, in a substantially cylindrical shape, and is clamped and fixed in the vehicle vertical direction by a support member 36 and a fixing member 38. The support member 36 is disposed on the vehicle lower side of the fuel tank 12, and the fixing member 38 is disposed on the vehicle upper side of the fuel tank 12. A front end portion of the support member 36 is bolted to the reinforcing member 22. The rear end portion of the support member 36 is bolted to the tank bracket 26. A reinforcing member 42 is provided on the lower surface side of the support member 36 between the rear end portion and the fuel tank 12.

  The front end portion of the fixing member 38 is rotatably supported by the support member 36. The rear end portion of the fixing member 38 is fastened to the reinforcing member 42 using a bolt 39. By fastening the rear end portion, a holding force of the support member 36 and the fixing member 38 with respect to the fuel tank 12 is generated.

  A secondary battery 32 is mounted on the middle part of the floor 16 (section b). The section b includes the vicinity of the rear seat 30 on the floor 16 in the vehicle rear side. The rear end of the floor 16 is coupled to the rear end 28 of the body 18, and a storage space 34 is provided between the secondary battery 32 and the rear end 28, for example. The rear end 28 is, for example, a lower back panel. In FIG. 1, a portion between the rear end of the section b and the rear end 28 of the body 18 is defined as a section a.

  The drive motor 14 is a drive means for the rear wheels, and is provided below the vehicle on the floor 16 and behind the fuel tank 12 in the vehicle. In other words, the drive motor 14 is located below the middle part of the floor 16 (section b). Further, it is fixed to a suspension member 46 for the rear wheel through a motor mount 44. The drive motor 14 drives left and right rear wheels (not shown) via left and right drive shafts 54, respectively. The rear end of the drive motor 14 is located on the vehicle rear side with respect to the rear end of the secondary battery 32. As shown in FIG. 2, the motor mount 44 is provided at one location on the outer side in the vehicle width direction of the front portion of the drive motor 14, and is interposed between the drive motor 14 and the suspension member 46. 14 is supported by vibration isolation.

  The suspension member 46 is provided by connecting a vertical member 48 and horizontal members 50 and 52. The vertical members 48 extend in the vehicle front-rear direction while being curved, and are provided as a pair on the left and right sides of the vehicle 10. The horizontal member 50 connects the front portions of the vertical member 48 in the vehicle width direction. The motor mount 44 is located on the lateral member 50. Moreover, the horizontal member 52 has connected the rear parts of the vertical member 48 in the vehicle width direction. The suspension member 46 is attached to the body 18 (FIG. 1).

  The tank bracket 26 and the motor mount 44 are arranged side by side in the vehicle front-rear direction. Specifically, the tank bracket 26 and the motor mount 44 are arranged side by side in the vehicle front-rear direction in a plan view of the vehicle (FIG. 2), and are also arranged side by side in the vehicle front-rear direction in a side view of the vehicle. The tank bracket 26 is provided on the vehicle front side of the motor mount 44. The tank bracket 26 and the motor mount 44 are provided close to each other so that a collision load at the time of a rear collision can be efficiently transmitted from the motor mount 44 to the tank bracket 26.

  In FIG. 1, the front portion of the floor 16 is defined as a section c. The section c is a portion from the front end of the section b to the vicinity of the reinforcing member 22. The fuel tank 12 is located in this section c. In addition, the front part, the center part, and the rear part of the floor 16 are divisions in the vehicle front-rear direction in a region on the rear side of the vehicle from the position where the rear seat 30 is arranged on the floor 16, such as front seats (not shown). ) Is not included.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the vehicle structure S according to the present embodiment, when a collision load F is input to the rear end 28 of the body 18 of the vehicle 10 from the barrier 40 imitating the opponent vehicle at the time of a rear collision, The section a) is compressed and deformed in the vehicle longitudinal direction, and the rear end 28 of the body 18 moves forward of the vehicle. As indicated by a two-dot chain line in FIG. 1, the rear end 28 contacts the drive motor 14, whereby the collision load F is transmitted to the drive motor 14 in the direction of arrow A. Since the rear end of the drive motor 14 is located behind the rear end of the secondary battery 32, the rear end 28 of the body 18 easily comes into contact with the drive motor 14 prior to the secondary battery 32. . Thereby, the input of the collision load F to the secondary battery 32 is suppressed.

  Subsequently, the collision load F transmitted to the drive motor 14 is transmitted to the motor mount 44 in the arrow B direction. As shown in FIGS. 1 and 2, the tank bracket 26 and the motor mount 44 are arranged side by side in the vehicle front-rear direction and are provided close to each other, so that the middle part of the floor 16 (section b section). While the motor is hardly deformed, the motor mount 44 contacts the tank bracket 26. As a result, the collision load F is transmitted from the motor mount 44 to the tank bracket 26 in the direction of arrow C. Thus, the collision load F input to the rear end 28 of the body 18 of the vehicle 10 passes through the drive motor 14, the motor mount 44 and the tank bracket 26 from the rear portion of the floor 16 to the front portion ( (Section c).

  Due to the collision load F transmitted to the tank bracket 26, the front portion of the floor 16 (portion c) is compressed and deformed in the vehicle longitudinal direction. Since the fuel tank 12 is not easily deformed, the support member 36 and the fixing member 38 that sandwich the fuel tank 12 and a part of the floor panel 20 are deformed.

  In this way, deformation of the middle portion of the floor 16 (section b), particularly deformation of the portion between the motor mount 44 and the tank bracket 26, is suppressed, and the distance between the drive motor 14 and the fuel tank 12 is reduced. Thus, contact of the drive motor 14 with the fuel tank 12 is suppressed. Moreover, since the deformation | transformation of the center part (part of the area b) of the floor 16 is suppressed, since the distance between the rear end 28 of the body 18 and the secondary battery 32 is ensured, the collision load F is a secondary battery. 32 is suppressed from being transmitted. Therefore, according to this embodiment, the influence on the secondary battery and the drive motor 14 at the time of a rear collision can be suppressed.

[Other Embodiments]
As mentioned above, although an example of embodiment of this invention was demonstrated, embodiment of this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can implement variously. Of course there is.

DESCRIPTION OF SYMBOLS 10 Vehicle 12 Fuel tank 14 Drive motor 16 Floor 26 Tank bracket 44 Motor mount 46 Suspension member S Vehicle structure

Claims (1)

A fuel tank fixed via a tank bracket below the vehicle floor of the vehicle;
The rear wheel drive motor is provided below the floor of the vehicle and behind the fuel tank and fixed to a rear wheel suspension member via a motor mount,
A vehicle structure in which the tank bracket and the motor mount are arranged side by side in the vehicle front-rear direction.