JP6599765B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure including a toe board that partitions the interior and exterior on the front side of a passenger compartment, a floor panel that forms a floor surface of the passenger compartment, and a cross member that is provided on the toe board and extends in the left-right direction.

  As this type of vehicle structure, a left and right side having a bent portion inclined from the front in the left and right direction to the rear in the left and right direction and an extending portion extending from the rear end portion of the bent portion to the rear of the vehicle body along the floor tunnel portion. A connecting member that includes a pair of side members and connects the rear end portions of the bent portions of the side members to each other in an X shape in plan view is known (see, for example, Patent Document 1). According to Patent Document 1, this configuration can improve the transmission efficiency when a load input to one front side member is transmitted to the other front side member.

JP-A-2005-206108

  The vehicle body structure described in Patent Document 1 is considered to be effective at the time of an offset collision and an oblique collision in which a load from the left and right sides of the front portion of the vehicle body is applied to the rear. However, at the time of a full lap collision in which a load is applied to the rear of the front part of the vehicle body in the left-right direction, energy absorption may be hindered by the connecting member.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to accurately absorb energy at the time of a full wrap collision while ensuring the strength of the passenger compartment at the time of offset collision and oblique collision. It is to provide a vehicle body structure that can be used.

  In order to achieve the above object, according to the present invention, a toe board that partitions the interior and the exterior on the front side of a passenger compartment, a floor panel that forms a floor surface of the passenger compartment, a left and right direction provided on the toe board, And a cross member that forms a closed cross-section together with a cross-member that has a front end connected to a portion of the toe board that forms the closed cross-section and a rear end connected to the floor panel in an X-shaped plan view. A vehicle body structure is provided.

According to this vehicle body structure, the X-shaped stiffening member in plan view includes a first extending portion extending obliquely from one side to the other in the rearward direction and a second extending portion extending obliquely from the left and right other side to the other. Are crossed.
At the time of an offset collision and an oblique collision, a load from the left and right sides of the front part of the vehicle body is applied to the rear, and a load to the rear is applied to the left and right sides of the cross member. At this time, the load acting on one of the left and right sides of the cross member can be transmitted to the other left and right sides of the floor panel via the first extending portion of the stiffening member. Thereby, the intensity | strength of the compartment at the time of an offset collision and an oblique collision can be improved.
On the other hand, during a full lap collision, a rearward load is applied to the front portion of the vehicle body in the left-right direction, and a rearward load is applied to the cross member in the left-right direction of the cross member. At this time, the stiffening member is crushed in the front-rear direction around the intersection of the first extending portion and the second extending portion. Thereby, the energy absorption amount at the time of a full wrap collision can be improved.

  In the vehicle body structure, the floor panel may have a tunnel portion that extends in the front-rear direction and protrudes upward in the center of the left and right, and the stiffening member may be disposed on the upper side of the tunnel portion.

  According to this vehicle body structure, a load transmitted from the cross member to the floor panel via the stiffening member can be transmitted to the tunnel portion having a relatively high strength.

  In the vehicle body structure, the tunnel portion has a pair of left and right side surfaces and an upper surface connecting the upper ends of the side surfaces, and the stiffening member has a rear end side on a lower end side of the side surface of the tunnel portion. It may be connected.

  According to this vehicle body structure, the load transmitted from the cross member to the floor panel via the stiffening member can be transmitted to the lower end side of the tunnel portion.

  In the vehicle body structure, the tunnel portion includes a pair of left and right side surfaces and an upper surface connecting upper ends of the side surfaces, and the stiffening member has a rear end side formed by the upper surface and the side surface of the tunnel portion. You may connect to the corner | angular part formed or its vicinity.

  According to this vehicle body structure, the load transmitted from the cross member to the floor panel via the stiffening member can be transmitted to the corner portion of the tunnel portion.

  The said vehicle body structure WHEREIN: The said corner | angular part of the said tunnel part may be comprised by the angle | corner R which continued toward the back from the connection part of the said toe board and the said tunnel part.

  ADVANTAGE OF THE INVENTION According to this invention, energy absorption can be aimed at exactly at the time of a full lap collision, ensuring the intensity | strength of the compartment at the time of an offset collision and an oblique collision.

It is the schematic perspective view seen from the front of the vehicle body structure which shows one Embodiment of this invention. It is the schematic perspective view seen from the back of a vehicle body structure. It is plane explanatory drawing which shows the transmission state of the load at the time of an offset collision and an oblique collision. It is plane explanatory drawing which shows the transmission state of the load at the time of a full wrap collision. It is the schematic perspective view seen from the front of the vehicle body structure which shows a modification. It is the schematic perspective view seen from the back of the vehicle body structure which shows a modification.

  1 to 4 show an embodiment of the present invention. FIG. 1 is a schematic perspective view seen from the front of the vehicle body structure, FIG. 2 is a schematic perspective view seen from the rear of the vehicle body structure, and FIG. FIG. 4 is an explanatory plan view showing a load transmission state at the time of a collision and an oblique collision, and FIG. 4 is an explanatory plan view showing a load transmission state at the time of a full-wrap collision.

  As shown in FIG. 1, the vehicle body 1 is configured by, for example, collecting panel-like members obtained by press-molding steel plates and joining them by spot welding or the like. The vehicle body 1 includes a toe board 10 that partitions the interior and exterior on the front side of the passenger compartment R, a floor panel 20 that forms the floor of the passenger compartment R, and a cross member 30 that is provided on the toe board 10 and extends in the left-right direction. . The cross member 30 forms a closed cross section in a side view with the toe board 10. Furthermore, the vehicle body 1 includes a pair of left and right side frames 40 extending in the front-rear direction on the front side of the vehicle, and the cross member 30 is connected to the side frames 40 on the left and right ends. Each side frame 40 has a closed cross section in a front view cross section. Further, the floor panel 20 has a tunnel portion 21 that extends in the front-rear direction and protrudes upward in the center of the left and right.

  The tunnel portion 21 is provided with a drive shaft for transmitting the driving force of the prime mover disposed in front of the passenger compartment to the rear wheel side. The tunnel portion 21 has a pair of left and right side surfaces 22, an upper surface 23 connecting the upper ends of the side surfaces 22, and a pair of left and right corner portions 24 formed by the side surfaces 22 and the upper surface 23. The corner portion 24 of the tunnel portion 21 is configured by a corner R that is continuous rearward from the connection portion between the toe board 10 and the tunnel portion 21. Each side surface 22 is formed upward from the main body portion of the floor panel 20 and forms a corner 25 together with the panel main body portion. In the present embodiment, each side surface 22 is inclined toward the left and right center side upward.

  As shown in FIG. 2, the vehicle body 1 has an X-shaped stiffening member 50 having a front end connected to a portion of the toe board 10 that forms a closed section together with the cross member 30 and a rear end connected to the floor panel 20. . Specifically, the stiffening member 50 includes a first extending portion 51 that extends obliquely from one side to the other in the rearward direction and a second extending portion 52 that extends obliquely from the left and right other side to the other, The extending portions 51 and 52 are configured to cross at the center side. The stiffening member 50 forms a closed section together with the floor panel 20.

  In the present embodiment, the stiffening member 50 is disposed on the upper side of the tunnel portion 21 and forms a closed cross section with the upper surface 23 of the tunnel portion 21. Further, the extending portions 51 and 52 of the stiffening member 50 are connected at the rear end side to the lower end side of the side surface 22 of the tunnel portion 21.

  According to the vehicle body structure configured as described above, the portion facing the cross member 30 of the toe board 10 and the tunnel portion 21 of the floor panel 20 are connected by the stiffening member 50. The rigidity of the front part is improved. In the floor panel 20, the vicinity of the corner portion 24 formed by the side surface 22 and the upper surface 23 in the tunnel portion 21 and the vicinity of the corner portion 25 formed by the side surface 22 of the tunnel portion 21 and the panel main body portion are relatively high in strength. In the present embodiment, the extending portions 51 and 52 of the stiffening member 50 extend to the side surface 22 of the tunnel portion 21 and the corner portion 25 of the panel body portion via the side surface 22 and the corner portion 24 of the upper surface 23. Yes. That is, the stiffening member 50 connects the cross member 30 of the toe board 10 to a relatively high strength portion of the floor panel 20, so that the rigidity of the vehicle body 1 can be effectively improved.

  Further, as shown in FIG. 3, at the time of offset collision and oblique collision, a load from the left and right sides of the front portion of the vehicle body 1 is applied to the rear, and a load to the rear is applied to the left and right sides of the cross member 30. Become. At this time, the load acting on one side of the cross member 30 can be transmitted to the other side of the floor panel 20 through the first extending portion 51 of the stiffening member 50. Thereby, the intensity | strength of the compartment at the time of an offset collision and an oblique collision can be improved.

  Furthermore, as shown in FIG. 4, at the time of a full lap collision, a rearward load is applied to the entire front portion of the vehicle body, and a rearward load is applied to the cross member 30 across the left and right directions of the cross member 30. At this time, the stiffening member 50 is crushed in the front-rear direction around the intersection of the first extending portion 51 and the second extending portion 52. Thereby, the energy absorption amount at the time of a full wrap collision can be improved.

  In the above-described embodiment, the rear end side of the stiffening member 50 is connected to the lower end side of the tunnel portion 21. However, if the stiffening member 50 is connected to the tunnel portion 21, the rear end side is extended to the lower end side. Not necessary. However, when connecting to the tunnel portion 21, for example, as shown in FIGS. 5 and 6, the rear end side is at least a height relative to the side surface 22 of the tunnel portion 21 and the corner portion 24 of the upper surface 23 or a peripheral plate portion in the vicinity thereof. It is preferable that it is connected to the rigid part.

  Moreover, in the said embodiment, although what applied this invention to the vehicle body 1 in which the tunnel part 21 was formed in the floor panel 20 was shown, even if it is the floor panel 20 which does not have the tunnel part 21, this invention. Can be applied.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

DESCRIPTION OF SYMBOLS 1 Car body 10 Toe board 20 Floor panel 21 Tunnel part 22 Side surface 23 Upper surface 24 Corner part 25 Corner part 30 Cross member 40 Side frame 50 Stiffening member 51 1st extension part 52 2nd extension part

Claims (3)

A toe board that partitions the interior and exterior at the front of the passenger compartment;
A floor panel forming the floor of the vehicle compartment;
In the vehicle body structure provided with a cross member provided on the toe board and extending in the left-right direction and forming a closed cross-section with the toe board
A front end side is connected to a portion of the toe board that forms the closed cross section, and a rear end side is provided with a stiffening member having an X shape in plan view connected to the floor panel ,
The floor panel has a tunnel portion extending in the front-rear direction and projecting upward in the left-right center,
The stiffening member is disposed above the tunnel portion,
The tunnel portion has a pair of left and right side surfaces, and an upper surface connecting the upper ends of the side surfaces,
The stiffening member has a vehicle body structure in which a rear end side is connected to a lower end side of the side surface of the tunnel portion . Before SL stiffening member, a vehicle body structure according to claim 1 in which the rear end is connected to the corner or its vicinity is formed by the upper surface and the side surface of the tunnel portion. The vehicle body structure according to claim 2 , wherein the corner portion of the tunnel portion is configured by a corner R that is continuous rearward from a connection portion between the toe board and the tunnel portion.

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