JP2003086217A - Frame structure to mount fuel cell system of fuel cell vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at improving energy absorption effect by promoting the crushing deformation amount toward the car width direction of a side part frame in a side collision. SOLUTION: If a collision input works to a side part frame 12 of the frame main body 11 from a side member 5 of a floor skeleton member 4 toward the car width via their binding parts 16, 17 in a side collision of a vehicle, the crushing deformation toward the inner side of the car width direction of the upper face is induced beginning from a bead 18 installed at the upper face of the side part frame 12 in the forward and the backward direction, and the closed cross-sectional face of the side part frame 12 is crushing-deformed, and accompanied with this, the inward deformation amount of the side member 5 in the car width direction is promoted, and the energy can be absorbed efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell system mounting frame structure for a fuel cell vehicle.

[0002]

2. Description of the Related Art In a fuel cell vehicle, a fuel cell system mounting frame on which various fuel cell system components such as a fuel cell stack are mounted is fastened and fixed to a floor frame member on the lower surface of a vehicle body. As a structure in which such a driving power supply unit is mounted on the lower surface side of the vehicle body floor, there is, for example, one disclosed in Japanese Patent Application Laid-Open No. 7-52835.

In this, a battery frame carrying a plurality of batteries is attached to the lower surface of a floor frame member by butting and fastening them with bolts and nuts, and on the upper surface of the side frame of the battery frame, before and after the fastening point. While the plurality of convex beads are provided in the vehicle width direction on the vehicle side, a plurality of concave beads that fit with the convex beads are provided in the vehicle width direction on the lower surface of the side member of the floor frame member corresponding to the side frame, and the fastening is performed. The rigidity around the points is increased.

[0004]

By connecting the battery frame to the lower surface of the floor frame member, the floor rigidity is increased, and the side frame upper surface of the battery frame and the side member lower surface are fitted to each other. By providing the plurality of beads in the vehicle width direction, the rigidity of these side members and the side frame with respect to the vehicle width direction input is further enhanced.

Therefore, the deformation of the side members and the side frame inward in the vehicle width direction is suppressed at the time of a side collision of the vehicle, and it becomes difficult to appropriately control the amount of deformation movement of the center pillar toward the vehicle interior. there is a possibility.

Therefore, according to the present invention, the side frame of the fuel cell system mounting frame in the fuel cell vehicle can be easily deformed in the vehicle width direction with respect to the vehicle width direction input, and the vehicle of the center pillar in a side collision can be obtained. (EN) A fuel cell system mounting frame structure for a fuel cell vehicle capable of appropriately controlling the amount of deformation and movement toward the room side.

[0007]

According to the invention of claim 1, a pair of side frames having a closed cross section extending in the front-rear direction and a front of the closed cross section connecting the side frames in the vehicle width direction. A fuel cell system mounting frame structure for a fuel cell vehicle, in which various fuel cell system components are mounted and a top surface of the frame is superposed on a bottom surface of a floor frame member on a bottom surface of the vehicle body and fastened and fixed. A bead is provided at least on the upper surface of the side frame in the front-rear direction.

According to a second aspect of the present invention, there is provided a fuel cell system mounting frame structure for a fuel cell vehicle according to the first aspect, wherein the side frame upper surface and the floor frame member lower surface are fastened and fixed in a vertical direction. The bead on the upper surface of the side frame is provided on the inner side in the vehicle width direction with respect to the fastening fixing point.

According to the invention of claim 3, claims 1 and 2 are provided.
The fuel cell system-equipped frame structure for a fuel cell vehicle according to 1, wherein a bead that fits with a bead on the upper surface of the side frame is provided in the front-back direction on the lower surface of the floor frame member corresponding to the side frame. It has a feature.

According to a fourth aspect of the invention, there is provided a fuel cell system mounting frame structure for a fuel cell vehicle according to the third aspect, wherein the bead on the upper surface of the side frame is formed in a concave shape, and the floor frame member is formed. It is characterized in that the bead on the lower surface is formed in a convex shape.

According to a fifth aspect of the present invention, there is provided the fuel cell system mounting frame structure for a fuel cell vehicle according to the fourth aspect, wherein the convex bead on the lower surface of the floor frame member is on the upper surface of the side frame. It is characterized in that the protruding height is formed shorter than the molding depth of the concave bead.

According to the invention of claim 6, claims 1 to 5 are provided.
The fuel cell system-equipped frame structure for a fuel cell vehicle as described in [4], wherein a bead is provided on the lower surface of the side frame in the front-rear direction.

According to a seventh aspect of the present invention, there is provided a fuel cell system mounting frame structure for a fuel cell vehicle according to the sixth aspect, wherein the upper and lower beads of the side frame are formed in a concave shape. It is characterized in that the molding depth of the lower surface side bead is made larger than the molding depth of the upper surface side bead.

According to the invention of claim 8, claims 1 to 7 are provided.
The fuel cell system-equipped frame structure for a fuel cell vehicle according to claim 1, wherein the upper side of the side frame has a frame of the side frame below the fastening point between the side frame upper surface and the floor frame member lower surface. It is characterized in that a bolt and a nut for fastening the cross section in the vehicle width direction are provided.

According to the invention of claim 9, claims 1 to 8 are provided.
The fuel cell system mounting frame structure for a fuel cell vehicle according to the above item 4, characterized in that at least the side frame is formed of an extruded material of a lightweight metal material.

[0016]

According to the first aspect of the present invention, at the time of a side collision of the vehicle, a collision input from the floor frame member to the side frame of the fuel cell system mounting frame in the vehicle width direction via the fastening portions thereof. When actuated, a bead provided in the front-rear direction on the upper surface of the side frame is used as a starting point to induce crush deformation of the upper surface inward in the vehicle width direction, so that the closed cross section of the side frame is entirely inward in the vehicle width direction. It is crushed and deformed, and accordingly, the member corresponding to the side frame of the floor frame member is urged to be deformed inward in the vehicle width direction.

As a result, not only the collision energy can be absorbed efficiently, but also the deformation movement of the lower portion of the center pillar inward in the vehicle width direction is allowed, and the reaction thereof causes the deformation movement amount of the upper portion of the center pillar inward in the vehicle width direction. It can be suppressed small to protect the passenger compartment.

According to the invention of claim 2, claim 1
In addition to the effect of the present invention, since the bead on the upper surface of the side frame is provided on the inner side in the vehicle width direction with respect to the fastening point with the floor frame member, the side impact input uses this fastening point as a rigid input transmission system. It is possible to act on the bead in the vehicle width direction, to promptly perform the deformation inducing action of the bead, and to smoothly perform the collapse deformation of the side frame.

According to the third aspect of the invention, in addition to the effects of the first and second aspects of the invention, a bead for fitting with the bead on the upper surface of the side frame is provided on the lower surface of the floor frame member. The beads induce crush deformation of the lower surface of the floor skeleton member inward in the vehicle width direction to enhance the energy absorption effect and facilitate deformation and movement of the lower part of the center pillar inward in the vehicle width direction. The room protection effect can be enhanced.

According to the invention of claim 4, claim 3
In addition to the effect of the present invention, since the side impact input can be directly exerted from the convex bead on the lower surface of the floor frame member to the concave bead on the upper surface of the side frame toward the inner side in the vehicle width direction, The crushing deformation of the side frame inward in the vehicle width direction can be efficiently performed.

According to the invention of claim 5, claim 4
In addition to the effect of the invention described above, since the protruding height of the convex bead on the lower surface of the floor skeleton member is small, formability can be ensured when the floor skeleton member is press-molded.

According to the invention of claim 6, claim 1
In addition to the effects of the invention of 5 to 5, since the bead is also provided in the front-rear direction on the lower surface of the side frame, crush deformation of the lower surface of the side frame is induced from the bead, and the overall side frame The energy absorption effect can be enhanced by promoting the crushing deformation inward in the vehicle width direction.

According to the invention of claim 7, claim 6
In addition to the effect of the invention, the molding depth of the concave bead on the lower surface of the side frame farther from the fastening point, which is the side collision input point on the side frame, is greater than the molding depth of the concave bead on the upper surface side. Since it is large and the lower surface is easily crushed and deformed inward in the vehicle width direction, the upper and lower surfaces of the side frame are crushed and deformed in a well-balanced manner to further enhance the energy absorption effect.

According to the invention of claim 8, claim 1
In addition to the effects of the inventions of 7 to 7, since the tightening force in the vehicle width direction is applied to the closed frame in advance by the bolts and nuts on the side frame, the initial deformation of the side frame in the vehicle width direction is caused. Further, the synergistic effect of the tightening force can further promote the crushing deformation of the side frame inward in the vehicle width direction as a whole.

According to the invention of claim 9, claim 1
In addition to the effects of the inventions of 8 to 8, the side frame having the bead can be easily molded.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a vehicle body floor, and a floor tunnel 2 bulging upward is formed in the center of the vehicle width direction in the front-rear direction, and on the left and right floor surfaces of the floor tunnel 2. A plurality of front and rear reinforcements 3 each extending in the vehicle width direction are jointly arranged.

Reference numeral 4 denotes a floor frame member on the lower surface of the vehicle body floor 2, which is a pair of left and right side members 5 extending in the front-rear direction and joined to the lower surface of the vehicle body floor 1 to form a closed cross section.
A front cross member 6 and a rear cross member 7 that connect the side members 5 and 5 in the vehicle width direction and are joined to the lower surface of the vehicle body floor 1 to form a closed cross section; And a side sill 8 having a closed cross section arranged via a plurality of outriggers 9.

The outriggers 9 are joined to the lower surface of the vehicle body floor 1 to form a closed cross section, and the side sills 8 are joined to the side edges of the vehicle body floor 1 and extend in the front-rear direction.

Reference numeral 11 denotes a fuel cell system mounting frame (hereinafter, simply referred to as a frame body) on which various fuel cell system components including the fuel cell stack 10 are mounted.
And a pair of left and right side frames 12 formed in a closed cross section and extending in the front-rear direction, and a front frame 13 and a rear side formed in the closed cross section for connecting the side frames 12 in the vehicle width direction. And a frame 14.

The frame body 11 is reinforced by providing a plurality of partition frames 11A that intersect in a cross pattern in the vicinity of the bottom inside thereof.

In this embodiment, the partition frame 1
The side frame 12 and the front and rear frames 13 and 14 including 1A are extruded from a lightweight metal material such as an aluminum alloy into a rectangular closed cross section.

The frame body 11 is the side frame 12
Also, the upper surfaces of the front and rear frames 13, 14 are superposed on the respective lower surfaces of the side members 5 of the floor skeleton member 4, the front cross member 6, and the rear cross member 7 corresponding to these, and the bolts provided on these superposed surfaces. As shown in FIG. 3, through the insertion hole 15, the bolt 16 and the nut 17 are fastened and fixed in the vertical direction and attached to the vehicle body side.

Beads 18 and 19 are formed on the upper and lower surfaces of the side frame 12 at the front and rear ends thereof.

In the present embodiment, these beads 18,
Each of 19 is formed in a concave shape having a triangular cross section, and a bead 20 having a triangular cross section which is fitted to the bead 18 is formed on the lower surface of the side member 5 in the front-rear direction.

The formation positions of the beads 18 and 20 are set inside the vehicle width direction with respect to the fastening point of the bolt 16 and the nut 17.

Further, the bead 19 on the lower surface side of the side frame 12 is set to have a molding depth larger than that of the bead 18 on the upper surface side.

Further, on the upper portion of the side frame 12, a bolt 21 for fastening the frame cross section of the side frame 12 in the vehicle width direction with a required fastening force below the fastening point of the bolt 16 and the nut 17. And a nut 22 are provided.

The arrangement position M of the bolt 21 and the nut 22 from the upper surface of the side frame is set so that L> M in relation to the length L of the bolt 16.

In this embodiment, the front and rear frames 13 and 14 are made of the same extruded material as the side frame 12. Therefore, the upper and lower surfaces of the front and rear frames 13 and 14, respectively, are used. A bead 23 having a sectional shape similar to that of the bead 18,
A bead 24 having the same sectional shape as that of the bead 19 is provided, while a bead 25 having the same sectional shape as the bead 20 is provided on the lower surfaces of the front cross member 6 and the rear cross member 7, and the beads 23, 25 are provided. Is formed at a position inside the front and rear frames 13 and 14 by the bolts 16 and nuts 17 and a connecting point of the upper surfaces of the members 6 and 7 corresponding thereto with respect to the front and rear direction.

According to the structure of the above-mentioned embodiment, when a collision input is applied in the vehicle width direction from the side member 5 to the side frame 12 via the fastening portions of the bolts 16 and the nuts 17 at the time of a side collision of the vehicle, With the beads 18 and 19 on the upper and lower surfaces of the side frame 12 as starting points, crushing deformation of the upper and lower surfaces inward in the vehicle width direction is induced, and the closed cross section of the side frame 12 is entirely in the vehicle width direction. The side member 5 is crushed and deformed inward, and accordingly, the side member 5 is crushed and deformed inward in the vehicle width direction.

As a result, not only the collision energy can be efficiently absorbed, but also the lower part of the center pillar (not shown) is allowed to deform and move inward in the vehicle width direction, and the reaction thereof causes the upper part of the center pillar to deform inward in the vehicle width direction. The amount of movement can be suppressed to a small level to protect the passenger compartment.

Here, in the present embodiment, as described above, the concave beads 18 and 1 are formed on the upper and lower surfaces of the side frame 12.
9, the crushing deformation of the upper and lower surfaces is induced from these beads 18 and 19 as starting points, and the crushing deformation of the side frame 12 toward the inside in the vehicle width direction can be promoted. The molding depth of the bead 19 on the lower surface farther from the fastening point of the bolt 16 and the nut 17 which is the side collision input point to the frame 12 is made larger than the molding depth of the bead 18 on the upper surface so that the lower surface is By making it easy to be crushed and deformed inward in the width direction, the upper and lower surfaces of the side frame 12 are crushed and deformed in a well-balanced manner, and the energy absorption effect can be enhanced.

The bead 18 is connected to the fastening points 16 and 17
Since the side collision input acts on the bead 18 in the vehicle width direction by using the fastening points 16 and 17 as a rigid input transmission system, the side impact input is quickly provided in the vehicle width direction. The crush deformation of the side frame 12 can be smoothly performed.

In particular, in this embodiment, since the convex bead 20 fitted to the bead 18 on the upper surface of the side frame 12 is provided on the lower surface of the side member 5, the vehicle of the side member 5 starts from the bead 20. The energy absorption effect can be enhanced by promoting the crushing deformation inward in the width direction, and the convex bead 20 to the concave bead 1 on the upper surface of the side frame.
The side impact input can be linearly applied to the inner side in the vehicle width direction, and the side frame 12 can be efficiently crushed and deformed inward in the vehicle width direction. Here, by fitting the convex bead 20 on the lower surface of the side member 5 and the bead 18 on the upper surface of the side frame 12,
When the frame body 11 is attached, positioning in the vehicle width direction on the vehicle body floor 2 can be easily performed.

Further, the bolt 21 and the nut 22 apply a tightening force in the vehicle width direction to the closed frame in advance on the side frame 12, so that the side frame 12 is crushed and deformed in the vehicle width direction at the initial stage. This synergistic effect of the tightening force can further promote the crushing deformation of the side frame 12 inward in the vehicle width direction as a whole.

Further, the arrangement position M of the bolt 21 and the nut 22 is set to L> M in relation to the length L of the bolt 16 for fastening and fixing. Even if the bolt 17 is loosened, the bolt 21 can prevent the bolt 16 from falling off.

In this embodiment, the bead 23 on the upper surface of the front frame 13 and the bead 2 on the lower surface of the front cross member 6 are used.
5, and the bead 23 on the upper surface of the rear frame 14 and the bead 25 on the lower surface of the rear cross member are fitted to each other.
Positioning of the vehicle in the front-rear direction can be easily performed.

FIG. 4 shows a second embodiment of the present invention. In the present embodiment, the bead 20 on the lower surface of the side member 5 in the first embodiment is formed in a trapezoidal cross section to have a protruding height. Has been made smaller.

Therefore, according to the structure of the second embodiment, in addition to the effects of the first embodiment, the side member 5 is provided.
In the case of press-molding, the drawing depth of the bead 20 becomes shallow, and formability can be secured.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, the bead 18 on the upper surface of the side frame 12 in the first embodiment is provided at a corner portion on the inner side in the vehicle width direction. A bead 18A having a triangular cross-section is formed, while a bead 20 on the lower surface of the side member 5 is formed.
Is formed by chamfering the corner portion on the inner side in the vehicle width direction in a slanted shape, and is engaged with the slant surface of the bead 18A.
It is formed as A.

Therefore, also in the third embodiment, the bead 18A and the slope 20A can be used as the crushing deformation inducing points in the vehicle width direction, and the side collision input is directly applied to the bead 18A from the slope 20A. The same effect as in the first embodiment can be obtained.

In each of the above embodiments, the side frame 1
Although the beads 18 and 19 for inducing deformation are provided on the upper and lower surfaces of 2, the desired object of the present invention can be achieved with only the bead 18 on the upper surface side, and in any of the embodiments. Since the side frame 12 is made of a lightweight metal extruded material, it can be easily formed into a closed cross-sectional shape including the beads 18 and 19 regardless of the depth of the beads 18 and 19.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a plan view showing a frame main body according to the first embodiment of the present invention.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view similar to FIG. 3, showing a second embodiment of the present invention.

FIG. 5 is a sectional view similar to FIG. 3, showing a third embodiment of the present invention.

[Explanation of symbols]

1 Body floor 4 floor skeleton members 11 Frame body (frame with fuel cell system) 12 side frame 13 front frame 14 Rear frame 16 Bolts for fastening 17 Nuts for fastening 18,18A Bead on the top side 19 Bottom bead 20,20A Bead on the bottom surface of the floor frame member 21 Tightening bolts 22 Tightening nut

Claims (9)

[Claims] 1. A variety of fuel cell system components comprising a pair of side frames having a closed cross section extending in the front-rear direction and front and rear frames having a closed cross section connecting the side frames in the vehicle width direction. Is a fuel cell system mounting frame structure of a fuel cell vehicle in which a frame upper surface is superposed on a lower surface of a floor skeleton member on a lower surface of a vehicle body and fastened and fixed. A fuel cell system-equipped frame structure for a fuel cell vehicle, characterized in that: 2. The upper surface of the side frame and the lower surface of the floor skeleton member are fastened and fixed in the vertical direction, and the bead on the upper surface of the side frame is provided on the inner side in the vehicle width direction from the fastening fixing point. The fuel cell system mounting frame structure for a fuel cell vehicle according to claim 1. 3. A bead for fitting with a bead on an upper surface of a side frame is provided on a lower surface of a floor frame member corresponding to the side frame in a front-rear direction.
2. A fuel cell system mounting frame structure for a fuel cell vehicle according to 2. 4. The fuel cell of a fuel cell vehicle according to claim 3, wherein the bead on the upper surface of the side frame is formed in a concave shape, and the bead on the lower surface of the floor frame member is formed in a convex shape. System mounted frame structure. 5. The convex bead on the lower surface of the floor frame member has a protruding height shorter than the molding depth of the concave bead on the upper surface of the side frame. Frame structure for fuel cell vehicle fuel cell system. 6. The fuel cell system mounting frame structure for a fuel cell vehicle according to claim 1, wherein a bead is provided on a lower surface of the side frame in a front-rear direction. 7. The bead on the upper surface and the lower surface of the side frame is formed in a concave shape, and the forming depth of the lower surface side bead is made larger than the forming depth of the upper surface side bead. Fuel cell system mounting frame structure of the fuel cell vehicle. 8. The upper portion of the side frame is provided with bolts and nuts for fastening the frame cross section of the side frame in the vehicle width direction below a fastening point between the upper surface of the side frame and the lower surface of the floor frame member. The fuel cell system mounting frame structure for a fuel cell vehicle according to any one of claims 1 to 7, wherein: 9. The fuel cell system mounting frame structure for a fuel cell vehicle according to claim 1, wherein at least the side frame is formed of an extruded material of a lightweight metal material.